Method of manufacturing heat-insulating bodies.



PATENTED MAY '7, 1907.

H. J. WADE.

METHOD OF MANUPAGT URING HEAT INSULATING BODIES.

APPLICATION FIL'ED MAR.15,19OG,

.HENRY JOHN WADE, OF WINONA, MINNESOTA.

METHOD OF MANUFACTURING HEAT-INSULATlNG BODIES.

Specification of Letters Patent.

Application filed March 15, 1906. Serial No. 306.187.

Patented May 7, 1907.

.To all miter/'1, 2113 may concern.-

Be it known that I, HENRY JOHN WADE, a citizen of the United States, residing at Winona, in the county of Winona and State of Minnesota, haveinvented a new and usefulMethod of Manufacturing Heat-Insulating Bodies, of which. the following is a specification.

This invention relates more particularly to the method of manufacturing heat insulating bodies, which are composed of fiber or the like, such as mineral wool, asbestos, vegetable and animal fibers, combinations of the same and other similar compositions Well known to the art.

It has long been desired to make blocks, bricks, tiles, slabs, boards and other self-sustaining articles of the above character, fire and moisture proof as well as capable of withstanding greater breakingstrains, but difficulty has been experienced in securing the desired results. coat the bodies with pitch, tar, asphaltum, silicate of sodium and like materials, by painting the same thereon and by dipping the bodies in the material while the latter is heated. It is found, however, that the coating is almost invariably porous, and that moisture and air readily circulate through the same. After a careful experiment and study, I find that the above defect is due to the application of the heated coating to the cold bodies, for the heat from the coating penetrating the body, expands the air therein and necessarily expels portions of it. This air therefore has to pass through the applied coat, which still i being in a fluid state,-thus has openings or pores formed in it by the escaping air. Moreover these coats While adding somewhat to the strength of the article, do not increase such strength any great degree.

The principal object in the present invention is to provide a method of manufacturing or coating the blocks, so that the coatwill not be porous, and in order that said coat will better combine with the body, of material and increase the strength thereof very materially.

substantially any shape, is first heated to It has been attempted to The drawing is a sectional perspective viewand the coat hardens. The above materials are of course particularly intended for water proofing. If it is desired to fire proof the article, the same is coated or dipped in silicatg of sodium, which may be either hot or col The above described method is important, for the following reasons. Inasmuch as the A body of the article is first heated, the air contained in the pores and cells thereof will be expanded, and consequently a considerable amount will be expelled from said body. Therefore when the coat is applied to the heated bodies, the air within said body will still be expanded. When removed from the influence of heat, however, the article begins to cool, the air contained therein Will constill fluid, will be drawn into the outer pores mingled with the fiber thereof. Moreover, this arrangement is found to eliminate the porosity of the coating and to greatly increase the strength of the article, furthermore permitting the same to be fastened to Walls, and the like without the danger of breakage.

The experiments and tests, which I have made in connection with this invention, have demonstrated its great utility. For such purposes, I have used the product known as lith, made by the Union Fibre Co, of Winona, Minn.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, 1s

1. That improvement in the art of manufacturing insulating blocks bricks, slabs, and the like, which consists in heating the dry porous and fibrous insulatingbody to expand the air contained in the pores thereof and drive a portion of such air out of the body, applying an air and moisture-proof surface coating to all sides of said body, while the tract, and consequently the coat, which is of the body, and become thoroughly com'-.

the article is set aside, so that the body cools same is heated and the air expanded, and al- 1 body of heat insulating fiber; second, heating lowing the body to cool and the coat to l the said body to expand the air contained harden. therein and cause a portion of the air to be 2. That imirovement in the art of manudriven out of the bodv, third, applying an facturinginsu ating blocks, bricks, slabs, and air and moisture-proo surface coating 111 a the like, which consists in forming an arti 1 liquid state to all portions of the body while ficial dry and porous body of matted fiber,

. the latter is hot; fourth allowing the body to heating the said body to expand the air concool and the coat to harden, whereby the tained in the pores thereof and drive a porcoat, intermingling with the fibrous body, tion of such air out of the body, applying an constitutes, when cold, a reinforcement for air and moisture-proof surface coatin in a the body; and finally applying silicate of soliquid state to all sides of said body While the dium to the coating so as. to make the body same is hot, and allowing the body to cool both fire and water-proof. and the coat to harden, said coat intermin In testimony, that I claim the foregoing as gling With the fibers and constituting, when my own, I have hereto affixed my signature cold, a hard reinforcement to the body. ,in the presence of two witnesses.

3. That improvement in the art of inanu- 5 HENRY JOHN WADE. facturing insulating blocks, bricks, tiles, boards, slabs, and the like, which consists in f first forming an artificial dry and porous i Witnesses EARL SIMPSON, S. S. STnAUsE. 

